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Unit 3 (Waves And Information Transfer) Review
Test Description: Review of waves and information transfer
Instructions: Answer all questions to get your test result.
1) Which waves can carry matter?
A
Transverse Waves
B
Mechanical Waves
C
none, waves carry energy
2) True or False: All waves need a medium to travel.
A
False; Electromagnetic waves can travel in a vacuum.
B
True
C
False; :Mechanical waves can travel in a vacuum.
3) Frequency is ...
A
the number of repetition of a wave in one second.
B
wave height.
C
the distance between two waves.
4) Sound waves travel at the same speed through solids, liquids, and gases.
A
False; They travel faster through a solid.
B
False; They travel faster through a liquid.
C
True
5) What is a wave?
A
something that moves matter
B
a disturbance that transmits energy from one place to another
C
the intensity at which energy moves
6) The crest of a wave is ...
A
the highest point of a wave.
B
the distance between two waves.
C
the frequency of a wave.
7) True or False: Light waves can travel through a vacuum.
A
False
B
True
8) Which object will allow light to pass through it?
A
stained glass
B
wooden door
C
safe
9) What color is formed when all the colors of light are combined?
A
black
B
brown
C
white
10) Which is a natural source of light?
A
laptop
B
flashlight
C
lightning
11) What is the difference between a longitudinal wave and a transverse wave?
A
the direction in which the vibration occurs
B
the frequency of a wave
C
the size of the wave
12) An opaque object ...
A
allows no light to pass through it.
B
allows all light to pass through it.
C
allows some light to pass through it.
13) Which choice below is NOT one of the seven colors of light waves?
A
yellow
B
orange
C
teal
14) Why are codes used to relay messages?
A
Everyone can understand them.
B
They can be encoded and decoded digitally and sent by waves.
C
They are short.
*select an answer for all questions
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